Water information people can actually use.

Every year, utilities publish detailed water quality reports. Almost nobody reads them. They're long, full of acronyms, and rarely answer the question people really have: is the water coming out of my kitchen tap OK, and if not, what should I do?

CityH2O exists to answer that question in plain language. We combine public data from utilities and regulators — the U.S. EPA, Health Canada, state and provincial agencies — with practical, certification-first advice on testing and treatment.

What we do

• City water profiles — where water comes from, who treats it, and how hard it is.
• Contaminant explainers — limits, health context and proven fixes.
• Free tools — the Filter Finder, lead risk check and practical calculators.
• Daily water news — an automated digest of public headlines.
• Free water checks — personal guidance and, on request, introductions to certified local pros.

What we don't do

We don't sell filters, we don't rank products for pay, and we never tell you water is unsafe (or safe) without evidence. We are not a utility, lab or government agency.

How we're funded

CityH2O is funded by display advertising (Google AdSense), clearly labelled sponsorships, referral fees from certified professionals when a reader asks to be connected, and reader support. None of these influence our safety information — see our editorial policy.

Get involved

Support our work, write or research for us, nominate a water hero, or send a correction.